[llvm] [ADT] Make use of subsetOf and anyCommon methods of BitVector (NFC) (PR #170876)

[Anatoly Trosinenko via llvm-commits]

https://github.com/atrosinenko commented:

Will fix soon.

PS: Well, I cannot `Approve` my own PR, this is reasonable, but why I cannot `Request changes`? :)

https://github.com/llvm/llvm-project/pull/170876